Adjustable saw-guide



(Model.) 4 Sheets-Sheet 1.

D. J. MURRAY.

ADJUSTABLE SAW GUIDE.

Patented June 26, 1888.

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D'. J. MURRAY.

ADJUSTABLE SAW GUIDE.

No. 385,131. Patented June 26, 1888.

(ModeL) 4 SheetsSheet 3. D. J. MURRAY.

ADJUSTABLE SAW GUIDE.

Patented June 26, 1888.

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(ModeL) 4, Sheets-Sheet 4.

D J. MURRAY.

ADJUSTABLE SAW GUIDE.

No. 385,131. P'atentedJune 26, 1888.

N TEn STAT-Es ADJUSTABLE SAW-GUIDE.

SPECIFICATION forming part of Letters Patent No. 385,131, dated June 26, 1888;

. Application filed March 9, i386. Renewed February 9, 1888. Serial No. 263,504. (Modch) To all whom it 1720,74 concern:

Be it known that I, DONALD J. BIURRAY, a citizen of the United States of America, residing at VVausau, in the county of Marathon and State of Wisconsin, havciuvcnted certain new and useful Improvements in Saw-Guides, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention is an adjustable sawguide embracing, in brief, the following novel features: an adj ustingly'sliding arm-carriage laterally riding upon the countcr'dovetail flangeslides of a longitudinally-adjuslable bed-plate and reciprocally moved by the obliquely-inclined edges of the top plate of an angle-block, sliding within a slot correspondingly cut underneath the front portion of said carriageplate, and longitudinally moved by a screwrod turned within said angle-bloek, sliding lengthwise the bed-plate between the end of said screw-rod and its wheel-block, the latter being either fixed upon one end of said carriage bed-plate or upon the rear end of'the tablehusk of the saw-frame; also, said carriage having a rigid box-frame upon its rear end, inclosing a pair of correspondingly-adjustable tube'shalls laterally turning and longitudinally sliding within bearings made through the sides of said box, between the lid and the bottom of which said shafts are clamped by an intermedial and vertically-closing nut-bolt; also, said shafts having each a crankformed arm upon its saw end, each one made regulatively adjustable with and on each side of the saw-rim by a screw-rod turned within its respective shaft-tube by an endwheel counter fixed upon the front end of said carriageplate; also, said shaft-arms furnished on their saw sides with saw-rim bearing and guiding pads of rawhide or wood, each made into a conical roll or bolt, by which to hold it in a corresponding socket made transversely into or through the outer end of each arm, and each directly in line with the other, so as to bring said pads into the same relation to each other on the opposite sides of the saw-rim; also, said shaft-arms having at their box-shoulders each an eccentrieally-curved checkstop, checking against one end of a bracketplate intermedially and horizontally projecting from the back of said box; and, finally, said carriage bedplate furnished with longitudinally-adjustive boltslots, one or more on each end thereof, all of which and their purposes are hereinafter more fully described, and illustrated by the accompanying drawings,in which like letters designate identical parts of my invention in the different figures, respectively.

The object of my invention is to guide and steady the rims of large saws, generally averaging five feet in diameter, which cut the logs into lumber as they comeinto the mill. These saws run at about six hundred and fifty revolutions per minute, and so large a plate of steel is inclined to sway from side to side when in motion, more especially when a log is being fed against the saw at the rate of three to ten inches per revolution. Thesaidrevolvingplatemust be held steadily in the line of its out; otherwise the great resistance would force its rim to one side or the other. A saw in motion, particularly of aforesaid size, seldom runs as a perfectly-plane disk, but always a little dishing 011 one side or the other, and this serious imperfection in running saws is completely corrected by my guide, which, together with other bencficial results and the means by which these are accomplished, is hereinafter fully described.

Figure 1 is a plan View of said invention, showing the top of the sliding arm-carriage, the box-clamped tube-shafts with their wheeladjustive screw -rods projecting from their front ends, and said crank-arms upon their rear or saw ends, and said obliquely and reciprocally moving and longitudinally rodscrewed angle-block with its whecl-blocl fixed upon the front edge of one end of the carriage bed-plate. Fig. 2 is a rear elevation or saw end and side, respectively, of said arm-carriage and its slide-flanged bed-plate. Fig. 3 is the end elevation of the same, looking from the rear of the saw. Fig. 4 is an under view of said carrier-plate and its tube-shaft boxing, showing especially the oblique slide-slot through which the reciprocally-screwed angleblock is adjustably moved. Fig. 5 is a plan view of the arm-carriage bed-plate with the carriage-plate removed, sh owing the top edges and sides of said carriageslides, the said angle-block with its reciprocally and adj ustively moving and moved screw-rod. and said adj ustive and table-fastening boltslots. Fig. 6 is a front view of said saw-guide mounted and adjusted upon the husk ofa saw-bearing frame and in operative relation with a rim-guided saw. Fig. 7 is a plan view or" said saw-guide mounted and adjusted in duplicate on said frame-husk, and showing how said double guides are made to cooperatively act upon the opposite and counter-running edges of a saw-rim by their mutually-moving longitudinal screw-rod; and Fig. 8 is a side elevation of the same, showing the front side of a saw and its marginal ri m included within the crank-- arms of the said duplicate guides.

The letter A represents said arm-carriage, which consists of a plate of cast metal of suitable dimensions and'of the general shape, as shown. It has mounted upon its rear portion a rigidly-cast box-frame, B, which is provided with a removable and hatch-jointing lid, a, having a suitable bolthole made through its center, through which the point of the nutbolt b is vertically passed from the box-base, whereby the box-lid is tightly clamped toward or upon the top edges of said box-frame. The side edges of said carriage-plate, at the foot of each end ofsaid rigid box, havea counter-dovetailcut cvenlyinto each, in order that each upper side of said dovetail angles 0 may rest and slidingly ride back and forth upon the top edges of the correspondingly-inclined slidetlangcs d of the bed-plate O of said arm-carriage and securely within the corresponding re-entrantangles of the same. Said bed-plate, which is also cast of suitable dimensions and shape, as shown, has formed upon its top surface, in addition to said slide-flanges, one or more bolt-slots, f, by which to adjustively bolt said bed-plate in any desired position relatively opposite the rim of a revolving saw upon the husk of the saw-frame table. These three elemental features of said device-na1nel y, the dovetail edges of said arm-carriage plate and the slide-flanges and adjustive bolt'slots of said carriage bed plate-form. the principal means whereby said arm-carriage is adj ustabl y placed in proper position to be effectively operated, as hereinafter described, upon asaw-rim. The further means whereby said arm-carriage is reciprocally and adjustively worked in relation to circular saws of large size are as follows: From the saw side of the box of said carriage A horizontally project the cranked arms 9 and 9, extending each from its respective end of one of a pair of tubed arm-shafts, h, as shown, and respectively placed, the arm 9 inside of said saw-ri m and the arm 9 outside of the same. Through the crank end of each of said arms is bored a corresponding padsocket, 2', each countertapering from the oppositely-facing sides toward the outer face of its arm-crank, and so located in each as to bring the said saw-rim bearing-pads j-the outer ends of which, whether suitably made and shaped of wood or rolls of rawhide, are thrust into said sockets-directly in line, the one opposite to the other. The tube-shafts h of said cranked arms are journaled in suitable bearings made through the front and rear sides of said carriage or shaft box B, as shown, and are reciprocally and independently slid back and forth by one of the pair of screw-rods r, which are each adjuslively turned by an end wheel supported each by one of a pair of wheel -blocks suitably fixed upon the front edge of said arnrearriagc plate A, as shown, each independentlymoved wheel to and w respectively shifting back and forth and adjustively setting its particular cranked arm g or g, as may be required, to bring each said guide-pad to its proper bearing relation with the other upon opposite sides of the intermedial saw-rim, as shown. In order to still further adjustively control the combined bearing position of said pads against said s-wcrving inclination to one side or the other of the sawrim during the revolutions ofthe saw and with out shift-ing either of said arms or pads from their set position against the saw, the armcarriage has an oblique slot, in, cut into the undersurfaee of the front portion of its sliding plate, as shown in Fig. 4, along which slot is reciprocally slid the cap-plate a of the intermediary and transversely plate-moving angle-block, p, which is directly slid back and forth along the rigid guide groove or trough q, made on the front of said carriage bed-plate O, as shown in Figs. 3 and 5, by means of the screw-rod r, which is adjustively turned within said sliding angle-block by the regulative end wheelfiV, supported in front of one of the ends of said bed-plate C, and screwing said rod 1" within said sliding angle-block or supported upon the end of said sliding block-rod, journaled and screwing back and forth in the rear end of said table-husk H of the saw-frame, as shown in Fig. 6 of the drawings. I11 order to prevent the inclined depression of said cranked arms, together with their bearing and guiding pads, below their properly even and horizontally-diametric position against each side of the continuously-descending saw-rim, the said tube-shafts it have one of the eccentric cheekstops it formed upon the outer end of each just within its arm-crank, which, while allowing each tube-shaft to countcrturn outward,

thereby getting said cranked arms out of the way of the saw-rim when displacing or unhanging the saw, completely stop said depres sion of the guide-pads by checking the end of the horizontal plane edge of each eccentricstop upon an intermedial bracket-table, o, fixed upon the back of said carriage-box B, as shown. In order to still further hold said tube-shafts from turning when adjusted and set in proper position,as aforestatcd,said boxlid a may be so formed as to its inner surface as to be directly clamped upon the cylindrical surfaces of said shafts, or upon intermedial concave half-boxes bearing on the same by means of the vertically and centrally placed and nutted bolt 1), the point of which is passed up through the recessed bottom and lid of said box, as shown. In order, also, to hold said transversel y-movin g carriageplate securely at rest upon and within said slide-flanges of its bed-p1ate, the clamping-plate a; is placed and interinedially held by one or more set-screws, y,clamping said plate against the lower side of one of said dovetail angles 0 of said carriageplate. In order to still further keep the rotation of said large-sized saws within the true line of their cut, a pair of said sawguides may be mounted and adjusted upon the said frame husk on the opposite segmental ends of the saw-rim, as shown in Figs. 7 and 8, and have their respective carriage-plate angle-blocks reciprocally and cooperatively moved, as in the case of said single-mounted guides, by the duplex-acting screw-rod a, similarly wheelturned and regulatively screwed forward and backward by the said single-action rod r, as shown in the previous figures of the drawings.

Therefore, having fully described said adjustive and adjusted parts of my said sawguide,what [claim as new, and desire to secure by Letters Patent, is

. 1. In the adjustable saw-guide herein described, the adj ustively sliding and slid armcarriage, furnished with the rigid box-frame,

having the pair of doveiailing augleslides cut into its basal ends and the obliquely-cut slot under the front end of its carrier-plate, in combination with the carriage bed-plate furnished with the correspondingly-inclined and carriagebearing slide-flanges,the end ad justed bolt-slots, and the front-placed guidetrough, in which is geared the longitudinallysliding, laterally-engaging, and regulativelymoving angle-block, all made to adjustably cooperate upon the husktahle ofasaw-franie,

substantially as and for the purposes herein specified.

2. In the arm-earriage of the sawguide herein described, the combination, with the rigid box having shaft-bearing sides, the nutbolted clamping-lid, and the crank-checking bracketplate, of the pair of longitudinallyadjustable and laterally-turning tube-shafts, furnished each on its rear or saw end with a connterfacing crank-arm, and on its front end with a regulatively-turned screw-rod,each said cranked arm having an eecentrieally-curved check-stop shoulder, and within a countertapering socket a counterfacing bearing guidepad, all made to regulatively cooperate upon each and both sides of a saw-ri-m,substantially as and for the purposes herein specified.

facing angle-slides of the arm-carriage box, containing and clamping the independentlyregulative tubeshaft and guide-pad gearing herein described,0f the set-screwed clampingplate intermedially held by the counter-faces of either set of dovetailing slides at each end of said carriage-box, and of the screw-geared angleblock oi'said bed-plate, the former having its obliquely-edged cap-plate regulatively engaging the correspondinglyoblique under slot of the latter, all substantially as and for the purposes herein specified.

In testimony whereof I affix my signature in presence of two witnesses.

DONALD J. MURRAY.

\Vi t nesses H. H. Fos'rnn, W. D. MURRAY.

i). The combinatioawith the basal connter- 

